Not all tree nut allergies can be prevented, but certain factors are associated with a lower risk of developing a tree nut allergy. These factors include early exposure to tree nuts (usually beginning around the age of 4 to 6 months), adequate vitamin D levels (vitamin D is implicated in the regulation of immune cells), early exposure to microorganisms and infections (known as the “hygiene hypothesis”), and maintaining the skin barrier (i.e., avoiding dry/cracked skin). Colloquially, these contributing factors are summarized as the “5Ds” for diet, vitamin D, dogs, dirt or dribble, and dry skin.[1]
Can you prevent a tree nut allergy?
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•Last Updated: May 16, 2025
Although not all tree nut allergies can be prevented, certain factors such as early exposure to tree nuts, adequate vitamin D levels, early exposure to microorganisms, and maintaining skin barrier health may lower the risk. These factors are often referred to as the “5Ds”: diet, vitamin D, dogs, dirt or dribble, and dry skin.